Title: Process for preparing 5-halo-2,3-phenylenediamine-1-carboxylic acid

Abstract: Method of preparing 5-halo-2,3-phenylenediamine-1-carboxylic acids having the following formula: ##SPC1## Wherein X is Cl, Br or F by reacting a 2,5-dihalo-3-nitrobenzoic acid with ammonium hydroxide to yield 5-halo-3-nitro anthranilic acid followed by a reduction of the resultant product. The 5-halo-2,3-phenylenediamine-1-carboxylic acids are useful as herbicides and as intermediates for use in the preparation of dyestuffs, photographic developers, pharmaceuticals, antioxidants and the like.

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Inventors: Chang, Charles H. (Loudonville, NY, US)
Randall, David I. (Easton, PA, US)

Application Number: 374574
Filing Date: 1973-06-28
Publication_date: 1976-01-06
Assignee: GAF Corporation (New York, NY)
Primary Class(es): 562/456 504/322, 562/437, 562/438, 562/457
Other Classes:
US Patent Ref:

3158646

Nov, 1964

Dorfman et al.

260/518.

Other Refs:
Primary Examiner: Weinberger, Lorraine A.
Assistant Examiner: Thaxton, L. A.
Attorney: Kehm; Walter C.